Senior full stack C# / .NET (core) developer

Salary Competitive

You will join a team that builds and maintains our cloud based ML backed software that doctors use with our Cortrium C3+ device every day. You will mainly be doing work across on the traditional web app backend to build and design a system that deals with the computationally heavy conversions and analysis of data of ECG recordings.

Initially you will work on our cloud based ECG visualisation and editing apps. Down the road you will help build our data visualiser and tooling to manage the very large amounts of data coming in and out of the system.

The recording files from our device are fairly large and computationally complex to view, modify, convert, transfer and store and as such you will be involved in solving scaling problems at a very early stage.

As a team member you will influence how we work with technology, how we keep things running and how (and why) we define end execute changes and new features.

In a field dominated by old-fashioned software and entrenched competitors you will help set new, higher, standards and make a real difference in the daily lives of our rapidly expanding user base of doctors and medical professionals.

Ideally you

  • are a great team player with an eye for esthetics - in code, design, technical architecture and user experience

  • are excited about technology and frequently fiddle with new frameworks and new ways of doing things

  • are curious and a quick learner

  • are motivated and qualified to make a difference

  • have at least four years of frontend and backend experience and understand and value the importance of both

  • value order and process but understand when to be pragmatic

  • get your things done but dot the i’s and cross the t’s first

A few technical keywords to lead you here

  • .NET(core)

  • C#

  • SQL Server

  • Blazor

  • HTML / Tailwind CSS

  • Javascript

  • Python

  • Electron

  • Azure

  • Git

  • CI / CD / Devops

  • TDD / Testing

Experience in other web application frameworks, other programming languages or medical ISO standards is not required but would be a plus.

About Cortrium

At Cortrium you will join an international melting pot of engineers, doctors and medical professionals, research scientists and business people from three continents and seven different countries. We build a portable, comfortable ECG recorder and offer our customers an end-to-end experience from our device to the final analysis of the recording.

We offer

  • A respectful and mature environment towards both work and life

  • Hybrid-friendly role

  • A humourous, diverse and vibrant international athmosphere

  • A fantastic, accessible office in a hardware startup co-lo in Taastrup. Goodbye traffic!

  • Gourmet lunch and free flowing coffee

  • An opportunity to, quite literally, save lives every day

When applying, please mention something that would surprise us to learn about you.

We will evaluate applications and schedule interviews progressively.

For more information or questions please contact us at

Perks and benefits

This job comes with several perks and benefits

Flexible working hours
Flexible working hours

Time is precious. Make it count. Morning person or night owl, this job is for you.

Free coffee / tea
Free coffee / tea

Get your caffeine fix to get you started and keep you going.

Near public transit
Near public transit

Easy access and treehugger friendly workplace.

Work life balance
Work life balance

Carve out time for your kids, friends and personal cider projects.

Skill development
Skill development

We want to take you from good to great.

Gym access
Gym access

Short, tall, skinny, chubby we like you just as you are. But if you dream about a bum like J-Lo we got you covered.

See all 7 benefits

Working at

Cortrium aims to make long-term ECG analysis easier and faster by an order of magnitude. We offer an end-to-end experience from our wireless and lightweight long term ECG recorder to the final analysis of the recordings, saving doctors’ and patients’ time. We deliver our ECG solution to GPs, cardiologists, and hospitals in more than 20 countries. Operating at the bleeding edge between technology and healthcare, we are committed to help healthcare professionals and patients.

Read more about Cortrium

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